Wear-resistant alloy material and plasma surfacing welding process of shield tunneling machine wear-resistant cutter ring

A wear-resistant alloy, plasma stack technology, applied in the field of shield cutting tools, can solve the problems of low production efficiency, poor quality stability, poor wear resistance, etc., to reduce excavation costs, high density and toughness, and increase wear resistance. sexual effect

Inactive Publication Date: 2019-11-08
中德云岭(成都)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of poor wear resistance, low production efficiency, and poor quality stability of shield machine cutter rings in the prior art, the present invention provides a wear-resistant alloy material and a plasma surfacing process for shield machine wear-resistant cutter rings, the purpose of which is to : Improve the wear resistance of the cutter ring of the shield machine, prolong the service life of the cutter ring, improve production efficiency, and improve quality stability

Method used

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  • Wear-resistant alloy material and plasma surfacing welding process of shield tunneling machine wear-resistant cutter ring
  • Wear-resistant alloy material and plasma surfacing welding process of shield tunneling machine wear-resistant cutter ring
  • Wear-resistant alloy material and plasma surfacing welding process of shield tunneling machine wear-resistant cutter ring

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Experimental program
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Effect test

Embodiment 1

[0056] A wear-resistant alloy material comprises NiCrBSi alloy and spherical cast tungsten carbide, the mass percentage of the NiCrBSi alloy is 35%, and the mass percentage of the spherical cast tungsten carbide is 65%. This setting can improve the wear resistance of the cutter ring of the shield machine and prolong the service life of the cutter ring.

[0057] The wear-resistant alloy material of the present embodiment is carried out reciprocating sliding wear test and sliding compound wear test:

[0058] ①Reciprocating sliding wear test: the number of reciprocating frictions N=2000 times, the wear scar width of the surfacing layer in this embodiment is 0.39mm, and the H13 mold steel commonly used in the prior art has a wear scar width of 0.67mm. It can be seen from the comparison that this embodiment The alloy material has better wear resistance.

[0059] ② Punching-sliding compound wear test: the number of impact wear N=15000 times, the impact zone and sliding zone of the ...

Embodiment 2

[0075] A wear-resistant alloy material comprises NiCrBSi alloy and spherical cast tungsten carbide, the mass percentage of the NiCrBSi alloy is 45%, and the mass percentage of the spherical cast tungsten carbide is 55%. This setting can improve the wear resistance of the cutter ring of the shield machine and prolong the service life of the cutter ring.

[0076] The wear-resistant alloy material of the present embodiment is carried out reciprocating sliding wear test and sliding compound wear test:

[0077] ① Reciprocating sliding wear test: the number of reciprocating frictions N = 2000 times, the wear scar width of the surfacing layer in this embodiment is 0.37mm, and the H13 mold steel commonly used in the prior art has a wear scar width of 0.67mm. It can be seen from the comparison that this embodiment The alloy material has better wear resistance.

[0078] ② Punching-sliding compound wear test: the number of impact wear N=15000 times, the impact zone and sliding zone of t...

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Abstract

The invention belongs to the technical field of shield cutters, and particularly relates to a wear-resistant alloy material and a plasma surfacing welding process of a shield tunneling machine wear-resistant cutter ring. The problems of poor wear resistance, low production efficiency and poor quality stability of a shield tunneling machine cutter ring in the prior art are solved. According to thetechnical scheme, the wear-resistant alloy material comprises NiCrBSi alloy and spherical cast tungsten carbide, wherein the mass percentage of the NiCrBSi alloy is 35%-45%, the mass percentage of thespherical cast tungsten carbide is 55%-65%, the plasma surfacing welding process comprises a. cleaning treatment, b. preheating treatment, c. adjusting of surfacing welding process parameters of a welding machine, d. positioning of a welding gun, e. surfacing starting, and f. heat preservation and cooling. The wear resistance of the shield tunneling machine cutter ring is improved, the service life of the cutter ring is prolonged, the consumption of the cutter ring and the workload of equipment maintenance are reduced, and the unit excavation cost is reduced. The material is suitable for manufacturing the shield tunneling machine wear-resistant cutter ring.

Description

technical field [0001] The invention belongs to the technical field of shield cutting tools, and in particular relates to a wear-resistant alloy material and a plasma surfacing process for a wear-resistant cutter ring of a shield machine. Background technique [0002] The shield machine is widely used in underground engineering and tunneling operations. It not only has high work efficiency and good safety performance, but also is economical and environmentally friendly. The cutter head of the shield machine is equipped with knives. When the shield machine is used for excavation, the disc hob or tooth cutter is mostly used to break the rock, and the auxiliary scraper is used to scrape the broken rock and repair the tunnel wall. During the process, the shield cutter not only bears a large rock-breaking force, but also suffers from long-term wear of the rock. The wear of the cutter seriously reduces the rock-breaking efficiency and the excavation diameter of the roadheader. For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K10/02C22C19/05
CPCB23K10/027C22C19/05
Inventor 蒙树立王毅姚兴涛杨和平吴小平
Owner 中德云岭(成都)科技有限公司
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